This is my "Recent log entries".

Type	     Datesort icon	Message	User	Operations
cron	     01/16/2012 - 08:09	Cron run completed.	admin	
update	01/16/2012 - 08:09	Attempted to fetch information about all available ...	admin	view
error	php	01/16/2012 - 08:09	Notice: Undefined index: in ...	admin	
error	php	01/16/2012 - 08:09	Notice: Undefined index: in ...	admin	
error	php	01/16/2012 - 08:09	Notice: Undefined index: in ...	admin	
error	php	01/16/2012 - 08:09	Notice: Undefined index: in ...	admin	
error	php	01/16/2012 - 08:09	Notice: Undefined index: in ...	admin

Eventhough it seems that the cron run completed, but with many errors occurred (much more than listed above).
They seems to happened on the same occasion. This is the detail of one

Location	http://dev.localhost/poormanscron/run-cron-check
Referrer	http://dev.localhost/admin/build/modules
Message	Notice: Undefined index: in update_xml_parser->end() (line 256 of /Users/gcybill/Sites/dev/modules/update/update.fetch.inc).
Severity	error